<template>
  <div>
    <!-- Header 区域 -->
    <van-nav-bar
      fixed
      title="文章详情"
      left-arrow
      @click-left="$router.push({
        path: '/layout/home'
      })"
    />
    <!-- 可修改文案和加载图标的颜色 -->
    <van-loading
      color="#0094ff"
      class="loadingArticle"
      v-if="artObj.title === undefined"
      vertical
      >文章疯狂加载ing...</van-loading
    >
    <div v-else>
      <!-- 文章信息区域 -->
      <div class="article-container">
        <!-- 文章标题 -->
        <h1 class="art-title">{{ artObj.title }}</h1>

        <!-- 用户信息 -->
        <van-cell
          center
          :title="artObj.aut_name"
          :label="formatDate(artObj.pubdate)"
        >
          <template #icon>
            <img :src="artObj.aut_photo" alt="" class="avatar" />
          </template>
          <template #default>
            <div>
              <van-button
                type="info"
                size="mini"
                v-if="artObj.is_followed"
                @click="followedFn(artObj.is_followed)"
                >已关注</van-button
              >
              <van-button
                icon="plus"
                type="info"
                size="mini"
                plain
                v-else
                @click="followedFn()"
                >关注</van-button
              >
            </div>
          </template>
        </van-cell>

        <!-- 分割线 -->
        <van-divider></van-divider>

        <!-- 文章内容 -->
        <div class="art-content" v-html="artObj.content"></div>

        <!-- 分割线 -->
        <van-divider>End</van-divider>

        <!-- 点赞 -->
        <div class="like-box">
          <van-button
            icon="good-job"
            type="danger"
            size="small"
            v-if="artObj.attitude === 1"
            @click="likeFn"
            >已点赞</van-button
          >
          <van-button
            icon="good-job-o"
            type="danger"
            plain
            size="small"
            v-else
            @click="unLikeFn"
            >点赞</van-button
          >
        </div>
      </div>
      <!-- 底部-评论 -->
      <comment-list></comment-list>
    </div>
  </div>
</template>

<script>
import * as dayjs from 'dayjs'
import * as relativeTime from 'dayjs/plugin/relativeTime' // import plugin
import 'dayjs/locale/zh-cn' // use locale
import {
  articleDetailAPI,
  followedUserAPI,
  unFollowedUserAPI,
  likeArticleAPI,
  unLikeArticleAPI
} from '@/api'
import CommentList from './CommentList.vue'
dayjs.extend(relativeTime) // use plugin
dayjs.locale('zh-cn')
export default {
  name: 'Article',
  components: { CommentList },
  async created () {
    const res = await articleDetailAPI({
      artId: this.$route.query.aid
    })
    // console.log(res)
    this.artObj = res.data.data
  },
  data () {
    return {
      artObj: {}
    }
  },
  methods: {
    // 格式化时间
    formatDate (dateStr) {
      var a = dayjs()
      var b = dayjs(dateStr)
      const c = a.to(b) // in 2 years
      // console.log(c)
      // return 返回值到函数调用的地方
      return c
    },
    // 关注按钮事件
    async followedFn (bool) {
      this.artObj.is_followed = !bool
      // 判断 为true时,关注作者,否则取关作者
      if (this.artObj.is_followed) {
        await followedUserAPI(this.artObj.aut_id)
        // console.log(res)
      } else {
        await unFollowedUserAPI(this.artObj.aut_id)
        // console.log(res)
      }
    },
    // 点击点赞
    async unLikeFn () {
      this.artObj.attitude = 1
      await likeArticleAPI(this.artObj.art_id)
      // console.log(this.artObj.attitude)
      // console.log(res)
    },
    // 点击已点赞
    async likeFn () {
      // 按钮转换为点赞
      this.artObj.attitude = 0
      // 发送取消点赞请求
      await unLikeArticleAPI(this.artObj.art_id)
      // console.log(this.artObj.attitude)
    }
  }
}
</script>

<style scoped lang="less">
.loadingArticle {
  margin-top: 46px;
}
.article-container {
  padding: 10px;
  margin-top: 46px;
}
.art-title {
  font-size: 16px;
  font-weight: bold;
  margin: 10px 0;
}

.art-content {
  font-size: 12px;
  line-height: 24px;
  width: 100%;
  overflow-x: scroll;
  word-break: break-all;
  /deep/ img {
    width: 100%;
  }
  /deep/ pre {
    white-space: pre-wrap;
    word-wrap: break-word;
  }
}

.van-cell {
  padding: 5px 0;
  &::after {
    display: none;
  }
}

.avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #f8f8f8;
  margin-right: 5px;
  border: none;
}

.like-box {
  display: flex;
  justify-content: center;
}
</style>
